Full list of all 12 Buku Sudoku (JP) achievements worth 200 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox 360.
Reach 10,000,000 Buku Score
Complete 200 puzzles.
Reach 2,500,000 Buku Score.
Complete 25 Multiplayer Games, in either Online or Local Multiplayer game play.
Complete 1 puzzle in Co-op, Team Battle, and Duel in Xbox LIVE mode
Complete 20 Xbox LIVE Games.
Beat a puzzle in each grid size: 6x6, 8x8, 9x9, and 12x12.
Complete a puzzle of each difficulty.
Solve 10 puzzles without any helpers.
Beat the time limit for 10 puzzles in Timed mode.
Complete a single player 9x9 puzzle in 1 minute and 20 seconds.
Complete all the tutorials.